Did high speed straight up climb after about 2 min of gentle 8's - saw purple smoke on descent (about 15' altititude), and when I got it autoed to the ground the ESC burst into flame! Motor still measured 229 degress F after I got it back in the house in about 5 minutes! ESC is charred pile of junk!!! Stopped the blades by hand- unplugged batts and ripped out the Flaming ESC. Saved everything (except ESC and maybe motor)

Should I trust the motor any more after this? Is there any known general reason for this? It has been a fine flying bird for the last 30 flights or so....

Proud Member of Team QuickUK, Team Duralite & Sponsored by V-blades & 4rc.nl

Ekim,

Mine didn't look like that- thanks for the info! Of course new or old doesn't help at this stage of the game! Just checked motor windings under magnification - fried bad! Align electrics are not impressing me

Think I will switch over to CC HV85 with A123 cells (10S). Anyone have motor recommendations for this combo?

Mine has the metal finned heat sink. Haven't had any problems yet.

raptor,

I have an Eagletree recorder but don't leave it connected all of the time. I am not sure there was any indication of a long term problem -just instant flame! This is the second one I have seen - a friend had his flameout on first run-up also...

Using the FP 4900 batts but only doing aerobatics so far so should not be demagnitizing- also always watch batt and do timed flights.. Must be bad luck

What goes up must come around

I added a couple of Radio Shack heat sinks using heatsink compound on top of the Align ESC heat sink. I also made sure there is an air gap between the ESC and the frame. No problems so far doing very mild flying. The ESC keeps very cool.

ancientaviator Nice Heatsink!
Sorry about the BQ catfight, at least it was minimal Damage!!

and one more thing "DON'T BE AFRAID!"

I added a couple of Radio Shack heat sinks using heatsink compound on top of the Align ESC heat sink. I also made sure there is an air gap between the ESC and the frame. No problems so far doing very mild flying. The ESC keeps very cool.

Proud Member of Team QuickUK, Team Duralite & Sponsored by V-blades & 4rc.nl

The headsink isn't really neede imho and it doesn't solve the problem of the esc's failing because they didn't change ANYTHING inside the esc, they only added a heatsink...

the heatsink lowers the operating temperature of the transistors in the controller. there is no need to change anything in the controller. the reason they were failing is because the amperage running through them was causing the fets to heat up far too high. the heatsink alleviated this condition so there was no need to change the design.

pru

Stupidity can be cured. Ignorance is for life!

Don't feel too bad catfight. I smoked mine last week after just throttling the thing up. The helicopter hasn't even had one full flight on it yet. I don't think I will be using the Align esc's anymore. I am going to upgrade to a higher amp speed controller for sure. Almost makes me want to go back to my Raptor.